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https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=22562bb222a91e0ecc416b19accd98e10c0d26be
commit 22562bb222a91e0ecc416b19accd98e10c0d26be
Author: Joseph Myers <joseph@codesourcery.com>
Date: Fri Jan 3 20:56:18 2014 +0000
Fix soft-float ldbl-128ibm atan2l signs of zero results (bug 16390).
This patch fixes bug 16390, incorrect signs of zero results from
ldbl-128ibm atan2l, soft-float only. The problem is a longstanding
GCC bug with fabsl not being correct for signed zero for soft float,
and the fix is using -fno-builtin-fabsl as a workaround, as already
done for various other source files. Tested powerpc-nofpu.
* sysdeps/powerpc/nofpu/Makefile [$(subdir) = math]
(CFLAGS-e_atan2l.c): Use -fno-builtin-fabsl.
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Summary of changes:
ChangeLog | 6 ++++++
NEWS | 2 +-
sysdeps/powerpc/nofpu/Makefile | 1 +
3 files changed, 8 insertions(+), 1 deletions(-)